The body is mostly lean (terse Quick Reference bullets and short section headings), but the opening paragraph explains why streaming matters and mentions LCP/perceived performance — concepts Claude already knows — adding unnecessary padding.

It names concrete tools and APIs ('renderToPipeableStream with Suspense boundaries', 'ReadableStream in a Node.js handler') and a concrete review checklist, but the body itself contains no executable code or commands — actual examples live in the reference file, so it instructs rather than being copy-paste ready.

The Check → Fix → Explain → Code Review sequence is a clear, ordered review workflow, and the Code Review section gives an explicit inspection checklist ('renderToString calls, missing Suspense boundaries, await on slow queries before returning').

A concise overview in SKILL.md points to a single, clearly signaled one-level reference ('see references/rule.md'), which is a real file with no nested references — content is appropriately split for this short skill.

It names the domain ('server-side rendering setup, Next.js App Router pages, or Node.js HTTP handlers') and one concrete action ('verify that HTML is streamed incrementally rather than buffered'), but does not list multiple distinct concrete actions like the score-3 anchor; a single verification task scoped to one niche.

An explicit 'Use when reviewing...' clause states when to invoke it, and 'to verify that HTML is streamed incrementally rather than buffered until completion' states what it does — both what and when are clearly and explicitly answered.

Phrases like 'server-side rendering setup', 'Next.js App Router pages', and 'Node.js HTTP handlers' are exactly the natural terms a developer would say when needing this skill, with good coverage of the relevant surface area.

The niche (verifying incremental HTML streaming in SSR/Node handlers) is narrow and tied to specific frameworks, making it unlikely to trigger for unrelated skills.